Title:
O/W EMULSION COMPOSITION
Document Type and Number:
WIPO Patent Application WO/2011/122072
Kind Code:
A1
Abstract:
Disclosed is an O/W emulsion composition which has excellent ultraviolet blocking ability, formulation stability and feeling of use. The O/W emulsion composition is characterized by containing the component (a) and the component (b) described below, and is also characterized in that emulsion particles that contain the component (a) have an average particle diameter of 800 nm or less.
(a) an organic ultraviolet absorbent which contains the following (a1), (a2) and (a3)
(a1) octocrylene
(a2) ethylhexyl methoxycinnamate
(a3) 4-t-butyl-4'-methoxydibenzoylmethane
(b) a polyoxyethylene-polyoxyalkylene alkyl ether block polymer represented by general formula (1) or (2)
R1O-(PO)m-(EO)n-H (1)
(In general formula (1), R1 represents a hydrocarbon group having 16-18 carbon atoms; PO represents an oxypropylene group; EO represents an oxyethylene group; PO and EO are added in blocks; and m and n respectively represent an average mole number of added PO and an average mole number of added EO, and satisfy 4 ≤ m < 70, 10 ≤ n < 70 and m < n.)
R2O-(AO)p-(EO)q-R3 (2)
(In general formula (2), R2 and R3 may be the same or different and each represents a hydrocarbon group having 1-4 carbon atoms; AO represents an oxyalkylene group having 3 or 4 carbon atoms; EO represents an oxyethylene group; AO and EO are added in blocks; and p and q respectively represent an average mole number of added AO and an average mole number of added EO, and satisfy 1 ≤ p ≤ 70, 1 ≤ q ≤ 70 and 0.5 < (q/(p + q)) < 0.8.)
Inventors:
TAKAKURA TOMIKO (JP)
KUROSAWA TAKAFUMI (JP)
YAJIMA ISAO (JP)
KUROSAWA TAKAFUMI (JP)
YAJIMA ISAO (JP)
Application Number:
PCT/JP2011/050860
Publication Date:
October 06, 2011
Filing Date:
January 19, 2011
Export Citation:
Assignee:
SHISEIDO CO LTD (JP)
TAKAKURA TOMIKO (JP)
KUROSAWA TAKAFUMI (JP)
YAJIMA ISAO (JP)
TAKAKURA TOMIKO (JP)
KUROSAWA TAKAFUMI (JP)
YAJIMA ISAO (JP)
International Classes:
A61K8/35; A61K8/06; A61K8/37; A61K8/40; A61K8/86; A61K8/90; A61Q17/04
Domestic Patent References:
| WO2010026755A1 | 2010-03-11 |
Foreign References:
| JP2007106715A | 2007-04-26 | |||
| JP2007014866A | 2007-01-25 | |||
| JP2009520707A | 2009-05-28 | |||
| JP2004083541A | 2004-03-18 | |||
| JPS5729213B2 | 1982-06-21 | |||
| JP2006182724A | 2006-07-13 |
Other References:
See also references of EP 2554157A4
Attorney, Agent or Firm:
IWAHASHI YUJI (JP)
Yuji Iwahashi (JP)
Yuji Iwahashi (JP)
Download PDF:
Claims: